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Negative numbers are called negative integers and positive numbers
are called positive integers. Zero is neither a negative nor
positive integer.
The set of integers consists of negative integers, zero and positive
integers. So:
The set of integers = {…, –3, –2, –1, 0, +1, +2, +3, … }
It is common practice to represent positive integers as 1, 2, 3, 4, …
Often we use a number line to represent the set of integers.
It is clear that a number on the number line is always larger than the
number to the left of it. For example:
Example 3
Represent the integers –5, –1, 2 and 4 on a number line.
Solution:
Example 4
Represent the integers that are greater than –3 and less than 3 on a
number line.
Solution:
Example 5
Insert the symbol > between the following pairs of integers:
Solution:
Use a number line to answer this question.
Example 6
Insert the symbol < between the following pairs of integers:
Solution:
Use a number line to answer this question.
Key Terms
negative integers, positive
integers, integers
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